550 CATALOGUE OF 



Male. White. Head on each side in front, and palpi 

 on each side towards the base dark brown. Antennae broadly 

 pectinated for full half the length from the base, setose 

 from thence to the tips ; branches ochraceous. Thorax pale 

 fawn-colour towards the hind border. Abdomen pale fawn- 

 colour, extending rather beyond the hind wings; apical tuft 

 long. Legs clothed with long hairs. Wings pale cinereous, semi- 

 hyaline; marginal line brown, interrupted. Fore wings narrow, 

 slightly acute, brilliantly iridescent, with a brown undulating oblique 

 band, which is dilated in front and contains a blackish discal spot 

 and an elongated costal pale cinereous spot ; six undulating brown 

 lines, of which two are on the inner side of the band and four on 

 the outer *side, exterior border convex, very oblique; veins white. 

 Hind wings short, with a brownish very widely interrupted sub- 

 marginal line. Length of the body 9 lines; of the wings 18 

 lines. 



This and the following species have much affinity to the genus 

 JEchedorus. 



a. Bogota. From Mr. Stevens' collection. 



Gastropacha opalina. 



Mas. Albida ; palpi porrecti, caput non sv per antes ; antennce 

 latissime pectinalce, ramis cervinis ; thorax fasciis nonnullis 

 cervinis, fasciculis duobus deflexis ; abdomen ochraceo-albidum 

 pilis longis dense hirtum^ alas posticas longissime superans ; 

 pedes brevissimi, densissime pilosi ; alee parvce, dentatce ; 

 aniicce angustce, iridescentes, vittis duobus latis spatioque 

 marginali cervinis, lincis qualuor postmediis albidis undulatis, 

 venis fusco strigatis ; posticce subochraceo-albida?. 



Male. Whitish. Head slightly tinged with fawn-colour. 

 Palpi porrect, pilose, not extending beyond the head. Antenna? 

 very broadly pectinated ; branches fawn-colour. Thorax with four 

 or five fawn-coloured bands ; a diverging tuft on each side near the 

 hind border. Abdomen densely clothed with long hairs, tinged 

 with ochraceous, extending very much beyond the hind wings; 

 apical tuft long. Legs very short, most densely clothed with long 

 hairs to the tips of the tarsi. Wings small, dentate. Fore wings 

 narrow, iridescent in the disk, rounded at the tips ; two irregular 

 broad stripes and a broad space along the exterior border fawn- 

 colour ; four whitish slightly undulating lines beyond the middle ; 



